gistfile1.txt

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
#include "syscfg/syscfg.h"
#include "sysinit/sysinit.h"
#include <os/os.h>
#include <pwm/pwm.h>
#include <bsp/bsp.h>
#include <easing/easing.h>

struct pwm_dev *pwm;
static struct os_callout my_callout;

// max supposed to be 65535, but were not getting anything above ~50000 ??
#define MAX_VALUE 50000
#define MAX_STEPS 300

// Im able to see SOME light event at like.. 5 so just start at 0
static volatile int32_t step = 0;

static void pwm_handler()
{
    // TODO Need this to be a one shot mode, so we dont have to ease out/manually disable duty cycle and turn off timer
    if(step<=MAX_STEPS){
        int32_t eased = bounce_int_out(step++, MAX_STEPS, MAX_VALUE);
        pwm_enable_duty_cycle(pwm, 0, eased);
    }
}

static void
pwm_toggle(struct os_event *ev)
{
    step=0;
    os_callout_reset(&my_callout, OS_TICKS_PER_SEC);
}

int
main(int argc, char **argv)
{
    int rc;

    sysinit();

    struct pwm_chan_cfg chan_conf = {
        .pin = LED_BLINK_PIN,
        .inverted = true,
        .data = pwm_handler
    };

#if MYNEWT_VAL(SOFT_PWM)
    pwm = (struct pwm_dev *) os_dev_open("spwm", 0, NULL);
#else
    pwm = (struct pwm_dev *) os_dev_open("pwm0", 0, NULL);
#endif

    /* set the PWM frequency */
    pwm_set_frequency(pwm, MAX_STEPS);

    /* setup led 1 - 100% duty cycle*/
    rc = pwm_chan_config(pwm, 0, &chan_conf);
    assert(rc == 0);

    rc = pwm_enable_duty_cycle(pwm, 0, 0);
    assert(rc == 0);

    os_callout_init(&my_callout, os_eventq_dflt_get(),
                    pwm_toggle, NULL);

    pwm_toggle(NULL);

    while (1) {
        os_eventq_run(os_eventq_dflt_get());
    }
    assert(0);
    return(0);
}